docs: def compare(self, word1, word2):
          """
          compare word1 and word2 for equality regardless of plurality
  
          return values:
          eq - the strings are equal
          p:s - word1 is the plural of word2
          s:p - word2 is the plural of word1
          p:p - word1 and word2 are two different plural forms of the one word
          False - otherwise
  
          """
          return (
              self._plequal(word1, word2, self.plural_noun)
              or self._plequal(word1, word2, self.plural_verb)
              or self._plequal(word1, word2, self.plural_adj)
          )